Features:-ATmega328P with Arduino bootloader-MAX7456 monochrome on-screen display-FTDI cable compatible pinout-Standard 6-pin ISP header-If you use it separately, please connect to APM by TX, RX Connector-If you use with 3DR Radio Telemetry, only need to connect the RX Connector, don't need the TX.-Two independent power sections with an LED indicator on each-Solder jumpers for combining the power sections-+5V 500mA regulator for up to +12V supply input-Solder jumper for PAL video option